|------------------------------------------------------------------------------
|-----------3----------------------------------0-----------3---------------------
|--------4---------4----0------------0-------2-----------4-----4---0----------0---
|-----4--------------4-------------0-------2-----------4---------4----------0-------
|--2-----------------------------2-------0-----------2--------------------2--------
|------------------------------3----------------------------------------3--------


|---------------------3-----0-----3-------3-------0------------------
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|------2------4-------0-----2-----4-------0-------2--------------------
|----2--------4-------0-----2-----2-------0-------2--------------------
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|---------------------3-------------------3-----------------------